How to check the numbers of characters of a string?

e.g I have a string, abcde. And I need a checker to check whether the string has 5 characters before executing a command.

Answer 1

[Pedro Villena]

str = num2str([17;10],'%05i')
if length(str(1,:))==5,
    %%%here is your command
end

or

str = num2str([17;10],'%05i')
if numel(str(1,:))==5,
    %%%here is your command
end

[Sean de Wolski]

This won't work, consider:

num2str([17;10],'%05i')

ans =
00017
00010

length(ans)

[Matt Fig]

Better to use NUMEL, for generality.

S = ['ertyu';'poiuy';'lkjhg';'nbvcx']
length(S)
numel(S)

[Matt Fig]

I should have hit refresh, I guess ;-).

Answer 2

[Sean de Wolski]

Pedro's code with numel as the size check:

numel(str)==5

Answer 3

[manoj saini]

>>a='string'; >>n=length(a) so n will return length of a string

Answer 4

[Ze Kai Ng]

I converted my string into vector form and cannot count using length(str).

Answer 5

[Ze Kai Ng]

Thank you everybody! I figured it out. I need to char(vec(pos)) first to convert to string then I can compare with the above methods.